PDF malware analysis — malicious · 56a6c2c56214a85f

MALICIOUS

PDF

77.4 KB Created: 2021-07-14 05:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: b06e39702944ac5a1312dc20c83d0b8f SHA-1: 8be79963dbff3e4af588b5ceec8f48e026c577e9 SHA-256: 56a6c2c56214a85f56b23b6d7b627a59f4eeafff53dbe97a2af975fd304b2905

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, pointing to a link farm designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://smidgel.ru/uplcv?utm_term=dr+angela+pardee PDF link annotation
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3479e373b9840f9fb1d5a64451f3e689/8897670094.pdfIn PDF document text
- http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01579b7c2---tuwofitibamuku.pdfIn PDF document text
- http://slbreakingnews.com/ckfinder/userfiles/files/77525416612.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b934733feda---62056758896.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/t8bug491ad7pgl3s4f6krmjrnv/vujenutup.pdfIn PDF document text
- https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0c2a45acb---maxugufujavufesebegopitu.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/1af2f7d5f50abf74f3afa057e2bf839e/18388068174.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62b31c6d5c---rexopitibixafebuzokerog.pdfIn PDF document text
- http://k-souz.com/userfiles/file/gisajorugolapuvivufupin.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7250d7322e---fitorobuxikel.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160b08b533ae87---bobadixajifelede.pdfIn PDF document text
- http://dongxuyen.org/upload/files/rilunupemokibop.pdfIn PDF document text
- https://castilloexterior.es/ckfinder/userfiles/files/muwefowumab.pdfIn PDF document text
- http://teplolux72.ru/upload/file/samalaketajajoxowutinora.pdfIn PDF document text
- http://househouse.it/userfiles/files/3153343878.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/6879cea296280025aa630e07fd07a700/waguwubut.pdfIn PDF document text
- http://gostinica-domodedovo.ru/files/noxobofakite.pdfIn PDF document text
- http://modnyi-buket.ru/uploads/files/tapokeferefu.pdfIn PDF document text
- http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a1677428d---8886565735.pdfIn PDF document text
- https://alate.org/admin/fckeditor/editorfile/rosamuvuxotidivotaxirofun.pdfIn PDF document text
- http://sevvalturizm.com/rsm/files/95746748065.pdfIn PDF document text
- https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/b037c249584179d61afead671526ba55/88147232711.pdfIn PDF document text
- http://ccadl.com/files/20210709131032.pdfIn PDF document text
- http://statewideroadservices.com/clients/879378/File/piwuxera.pdfIn PDF document text
- https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a76ccc6ba14---wisinonajatirasipur.pdfIn PDF document text
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b53d9131f39---sadutagotavalujidugo.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000cc72.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC72	10088 bytes
SHA-256: `067fb7b6fe48a3e5eeb46c8802833315112c6f9a48e5c04cb405621ced41288c`
`font_01_sfnt_off0000e2c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2C1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000fad3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAD3	16800 bytes
SHA-256: `5b896a400bb39fb2f8f94adcef7df3751ef5f9815e64563e8409f19ef6ef192d`

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